Implemented lots of actions in EditSpriteDialog

src/editor/dialogs/createspritedialog.cpp

@@ -1,6 +1,7 @@
 #include "createspritedialog.h"
 #include "ui_createspritedialog.h"
 
+#include <QMessageBox>
 #include <QPushButton>
 
 #include "editorguiutils.h"
@@ -32,3 +33,19 @@ QSize CreateSpriteDialog::spriteSize() const
 {
     return QSize{m_ui->spinBoxWidth->value(), m_ui->spinBoxHeight->value()};
 }
+
+void CreateSpriteDialog::accept()
+{
+    const auto size = spriteSize();
+    if (size.width() < 1)
+    {
+        QMessageBox::warning(this, tr("Zero width not possible!"), tr("Zero width not possible!"));
+        return;
+    }
+    if (size.height() < 1)
+    {
+        QMessageBox::warning(this, tr("Zero height not possible!"), tr("Zero height not possible!"));
+        return;
+    }
+    QDialog::accept();
+}